excellent diagram of how the transmission operates

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On the RGM website there is a section titled "TECH TIPS,HELP AND INSTRUCTIONS. " There is a list of perhaps 30 pdfs, one says "Norton AMC gearbox animated diagram". This is an excellent diagram in several segments showing just how the power is transmitted through the gears. It would be great to post it on this website permanently if there's no conflict with RGM.
 

Jerry Doe

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We can definitely post links to them. It’s all about keeping these bikes on the road. I will find them and add them to our links page.
 

grandpaul

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I wrote a start to finish narrative on how the whole engine works, but here's the transmission section which goes nicely with those slides:

Power from the engine is fed through the clutch center hub to the transmission mainshaft which has spline-driven gears that can be shifted to various positions resulting in different ratios between the input (mainshaft) and output shaft (layshaft). Power is transmitted from the mainshaft, through whichever gear pair is selected, to the layshaft, which turns the final drive sprocket, which drives the final drive chain, which drives the rear sprocket, turning the rear wheel.

The gear selector apparatus is a somewhat intricate assembly of pins, springs, pawls, cam and forks that operate thusly:
When the gearshift lever is depressed, a pin in the mechanism, that slips into a roller, that sits captive in a semi-circular “cup” in a gear-like apparatus that pivots on another pin, rotates slightly. The gear-like apparatus’ opposite end causes a camplate gear to rotate on it’s shaft. The front side of each of the two shifter forks has a pin; these pins wend their way through two curvaceous grooves cut in the face of the camplate as it rotates.

The two gear selector forks slide left-to-right on a shaft, with the tines of one fork riding captive in a groove of one gear on the mainshaft, and the tines of the other fork riding captive in a groove of another gear on the layshaft. So, as the gearshift camplate rotates, it moves the position of the appropriate gears one way or another, via the shifting forks, to align each matched pair in succession as the gears are selected. Regardless of the gear selected, power comes in through the mainshaft, feeds the selected drive gear, which feeds it’s paired driven gear, which feeds the layshaft, which feeds the drive sprocket.
 
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Mart UK

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Is it necessary to remove the primary case to change the drive sprocket?
 

robs ss

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Oldbritts had some excellent articles, including:
  1. Gearbox intro
  2. How does gearbox work
  3. Gearbox checklist
  4. Dismantling gearbox
  5. Assembling gearbox
  6. Gearbox pressure relief
I have pdf copies of these if anyone would like them - file size varies from quite small to 1.9Mb (assembling)
If anyone would like them please PM me.
@L.A.B. should I email them for the Tech Tips or do you already have them?
Cheers
Rob
 

L.A.B.

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On the RGM website there is a section titled "TECH TIPS,HELP AND INSTRUCTIONS. " There is a list of perhaps 30 pdfs, one says "Norton AMC gearbox animated diagram". This is an excellent diagram in several segments showing just how the power is transmitted through the gears. It would be great to post it on this website permanently if there's no conflict with RGM.
We can definitely post links to them. It’s all about keeping these bikes on the road. I will find them and add them to our links page.

If I remember correctly, that pdf used to be on Jerry Doe https://jerrydoe.com/ but seems not to be there now. (Jerry, some pages and links there don't work).
Oldbritts had some excellent articles, including:
  1. Gearbox intro
  2. How does gearbox work
  3. Gearbox checklist
  4. Dismantling gearbox
  5. Assembling gearbox
  6. Gearbox pressure relief
I have pdf copies of these if anyone would like them - file size varies from quite small to 1.9Mb (assembling)
If anyone would like them please PM me.
@L.A.B. should I email them for the Tech Tips or do you already have them?
Cheers
Rob

Well, there has been a link to the OldBritts tech. articles in the Tech Info. section for years. :)
All the articles and not just for the gearbox are useful (with the possible exception of the pressure relief one?) so it would mean listing them individually which would make the already long Tech Info Section even longer.
 
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Credits for these fine AMC gearbox diagrams should go to their creator, Les Howard.
He made them in Word, believe it or not..
About 10 years ago, Les was so kind to make a version in Dutch language for us.
Super.
 

Starvingphotog

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Oldbritts had some excellent articles, including:
  1. Gearbox intro
  2. How does gearbox work
  3. Gearbox checklist
  4. Dismantling gearbox
  5. Assembling gearbox
  6. Gearbox pressure relief
I have pdf copies of these if anyone would like them - file size varies from quite small to 1.9Mb (assembling)
If anyone would like them please PM me.
@L.A.B. should I email them for the Tech Tips or do you already have them?
Cheers
Rob
I Would like those PDFs Rob. My email is rslusa@me.com
 
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